I’ve been writing JavaScript on and off for nine years at the time of this writing. And if you’ve been close to a browser, chances are that you have too. You…

Kirill So

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In JavaScript, we have three types of scope - global, function, and block. You can redefine one with the same name in a different scope, and it won't cause an error. All variables declared with var and all functions declared with the function keyword are pulled to the top of their scope when they’re executed. The engine compiles JavaScript to machine code before executing.

A Half-Hour to Learn JavaScript

<p>This is like a mini Javascript documentation having all important topics like:
Scope,
Variable Keyword Scope,
Hoisting,
Variable Declaration,
Variables Software Design,
Values and References,
Coercion,
Logical Operator Return Values,
Equality,
Closures,
The ‘this’ Keyword,
The ‘new’ keyword,
Usage of ‘this’ and ‘new’,
Prototypes,
Classes,
Composition,
Inheritance and Performance,
Promises,
Async/Await,
Event Loop</p>
